2026. End-to-End Clinical Data Interoperability: A Practical Implementation Blueprint Using HL7, FHIR, CCD, and EHR Integration Standards. International Journal of Research Publications in Engineering, Technology and Management (IJRPETM). 9, 1 (Jan. 2026), 21–29. DOI:https://doi.org/10.15662/IJRPETM.2026.0901004.